// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef BASE_ANDROID_JAVA_HANDLER_THREAD_H_
#define BASE_ANDROID_JAVA_HANDLER_THREAD_H_

#include <jni.h>

#include <memory>

#include "base/android/scoped_java_ref.h"

namespace base {

class MessageLoop;
class WaitableEvent;

namespace android {

    // A Java Thread with a native message loop. To run tasks, post them
    // to the message loop and they will be scheduled along with Java tasks
    // on the thread.
    // This is useful for callbacks where the receiver expects a thread
    // with a prepared Looper.
    class BASE_EXPORT JavaHandlerThread {
    public:
        JavaHandlerThread(const char* name);
        virtual ~JavaHandlerThread();

        base::MessageLoop* message_loop() const { return message_loop_.get(); }
        void Start();
        void Stop();

        // Called from java on the newly created thread.
        // Start() will not return before this methods has finished.
        void InitializeThread(JNIEnv* env,
            const JavaParamRef<jobject>& obj,
            jlong event);
        void StopThread(JNIEnv* env,
            const JavaParamRef<jobject>& obj,
            jlong event);

        static bool RegisterBindings(JNIEnv* env);

    private:
        std::unique_ptr<base::MessageLoop> message_loop_;
        ScopedJavaGlobalRef<jobject> java_thread_;
    };

} // namespace android
} // namespace base

#endif // BASE_ANDROID_JAVA_HANDLER_THREAD_H_
